com.google.crypto.tink version 1.12.0 not accessible from maven central

[alexis gayte]

<dependency> 

    <groupId>com.google.crypto.tink</groupId> 

    <artifactId>apps-rewardedads</artifactId> 

    <version>1.12.0</version> 

</dependency>

While github ref to 1.12.0 as the last version this one is not accessible from all normal repository.